t *37 3 



whether fuch a fmall number of 

 them could affect obfervably fuch a 

 great body of air. I was aftonifhed. 

 to find they had fo much affected 

 the air, that it was rendered quite 

 unwholefome for breathing; it ex- 

 tinguished a flame ; and one mea- 

 fure of it with one of nitrous air 

 occupied 1.34. 



91. Three fmall unripe walnuts 

 were put under a jar of about three 

 ounce-meafures, from twelve till 

 two o' clock, in a room by day, 

 when the air in the jar was fo much 

 fpoiled as to extinguifh flame. Its 

 teft was, that one meafure of it with 

 one of nitrous air occupied 1.54* 



SEC 



